Paper cutting machine



Jan 19, 1937. A M SCH 2,068,504

PAPER CUTTING MACHINE Filed June 15, 1932 3 Sheets-Sheet l Jan. 19,1937. A. MISCH PAPER CUTTING MACHINE Fild June 15, 1932 s Sheets-Sheet 2INVENTOR Jan. 19, 1937. sc 2,068,504

PAPER CUTTING MACHINE Filed June 15, 1932- 3 Sheets-Sheet 3 Patented.Jan. 19, 1937 PAPER CUTTING MACHINE Augustus Misch, Bronx, N. Y.

Application June 15, 1932, Serial No. 617,272

16 Claims.

This invention relates to improvements in paper cutting machines, and itis the principal object of my invention to provide a machine in whichthe ingenious arrangement of the power unit producing the pressure,while developing an enormous clamping power and allowing the knife toproduce a shearing cut will save more than 59% of the power usedheretofore in the operation of such machines as the clamping unitpreserves and retains its power constantly in abeyanoe and requires asmall percentage of the operating force only for its actual operation toperform the cutting, while the paper stack is securely clamped at alltimes under a steady and uniform pressure during the cutting operationas Well as during a part of the upward stroke of the knife, depending onthe size of the 'paper pile.

Another object of my invention is the provision of a scale fortranslating and indicating by an ingenious construction the pressureexerted in tons.

It will be evident that I may use the machine of the guillotine typealso for cutting leather, textiles, rubber and the like holding thesematerials under a steady'pressure during the cutting operation and thesaid upward stroke of the knife.

The known paper cutting machines of this n type use clamping deviceswhich are operated by means of friction clutches, cams, springs and.levers and all use the entire force developed by the driving motor toproduce the power necessary for the clamping operation. I do away withsuch auxiliary devices for the clamping arrangement by producing theclamping power by hand to any necessary amount required and my novelclamping unit will keep this pressure translated and indicated by ascale in tons uniform and steady without changing the same and withoutthe necessity of using hardly any machine force to start the operationof the clamping device after each operation of the knife.

A further object of my invention is the provision of a flexible beamsupporting the carriage.

A still further object of my invention is the provision of a novel andimproved treadle construction including a balance beam or cradle tocenter the pressure in the middle of the clamping bar and the connectionof connecting levers for the treadle elements to ensure a parallelposition of the clamping bar to the table.

These and other objects and advantages of my invention will become morefully known as the description thereof proceeds, and will then be morespecifically defined in the appended claims.

In the accompanying drawings forming a ma terial part of thisdisclosure:

Fig. 1 is a front elevation of a paper cutting machine constructedaccording to my invention.

Fig. 2 is a side elevation thereof.

Fig. 3 is an interior view illustrating the clamping device.

Fig. 4 is a top plan view thereof.

Fig. 5 is an end view, partly in section.

Fig. 6 is a top plan view of the back plate of the clamping device.

Fig. 7 is a front elevation thereof.

Fig. 8 is an end view thereof.

Fig. 9 is a top plan view of a sledge.

Fig. 10 is a side View of the sledge.

Fig. 11 is an end view thereof.

Fig. 12 is a top plan view of a carriage.

Fig. 13 is a front elevation thereof.

Fig. 14 is a top plan view of a clamp beam.

Fig. 15 is a front elevation thereof.

As illustrated the machine frame is constructed of the base I and theside frames 2 and 3 erected on said base between which the table 4 isheld.

The knife bar is designated 5 and its knife 6 guided between the sideframes.

The paper stack clamping arrangement comprises a clamp beam 1 alsoguided between the side frames and connected by levers and rods with thetreadle 8 for the operation of the clamping device by foot.

The paper stack back gage It) is slidably arranged upon table t and ismoved along the; same by means of the endless chain H guided oversuitable sprocket Wheels one of which is operated by means of the handwheel I2 for the purpose of adjusting the material for the cut. The gageI6 is connected by means of an upright It?' clamping the band W toindicate the size of the stack on the band guided over suitable wheels13.

Above the clamp beam 1 and behind the knife bar 5 is arranged thecomplete mechanism for the clamping unit constructed according to myinvention comprising an inclined screw Hi adapted to be operated by ahand Wheel M at its upper end; and a scale 15 later to be more fullydescribed indicates the amount of pressure exerted by the clampingmechanism. Parts 6, F

1, 8, 14, 14 and 15 when assembled as illustrated in Figures 3, 4 and 5form a unit, which I call a. pressure producing unit producing aninternal and unexhaustible power which is transferred as clampingpressure on the paper stack holding the same under a constant weightduring the cutting period, and which after the cutting operation hasbeen finished is returned into the clamping housing as a. whole,unchanged, and ready for the next operation.

The knife bar is operated from a motor iii, the power of which istransmitted by gears i? and i3 operating the drive shaft is connected tothe knife bar 5 by means of the rods iii and ill.

The clamping device or unit includes a back plate 22 to guide thecombined clamping mechanism and to connect same with the knife bar 5slidably connected to the sledge 23 guided in the guides 22 and Knifebar 5 and the sledge 23 form a clamping housing in which is guided theflexible beam 25* and the roller carriage 23 to produce pressure betweenthe rim 25 and the guides and 33 on the knife bar. Back plate 21% servesthe purpose of guiding the sledge and to hold the same in its correctposition for the operation of the knife bar.

A sledge slides with its top 2-i,and its side groove 25 in the guides 22and 23 of the plate, and has in front an extended rim 25 which duringthe operation of the clamping unit presses on the balance beam i of theclamp beam l.

Levers 28 and 2% connect the clamp beam and balance beam l with theshaft til to hold the clamp beam parallel to the table 4i, and member ofthe shaft til is connected by a rod with the foot treadle 3. The backplate 22 is guided for vertical reciprocation with its ends in the sideframe bars 2 and 3.

The sledge 23 shown in Figures 3, 4i, and 5, is slidable horizontally ordisplaceable in the guides and 23, of the back plate and has slidablybolted thereto a carriage 23 carrying the rollers 22% and 21.

This carriage rests on top of a flexible beam The knife bar 5 carriesthe inclined or slanting guides 32 and 33 engaging the rollers 25 andill. The degree of slant of guides 33, corresponds to the degree ofslant of the roller guides 34 for the knife bar 5 and the guide 55 forthe sledge Under the extended rim 25 (Fig. 5) is shown the clamp beam lwith the balance beam i which serves the purpose of centering thepressure to the center of the beam i in accordance with the degree ofslope of the rim 25 The scale iii for translating and indicating thepressure in tons (Fig. 3) is bolted with its extension 37 to the sledge23 and the rack til of the scale mechanism is connected with thecarriage 23 and a finger having segmental gear teeth in engagement withthe rack is pivotally secured at its lower end while its other endcarries a curved member in engagement with a similarly shaped member atthe lower end of the hand, which is pivoted intermediate its ends to thescale housing.

For producing the clamping pressure one end of the angular lever 33 isattached to the sledge by means of a pin St while the other end of thelever carries an operating screw M equipped with a hand wheel i l.

This screw works with its end against the extension Ml of the sledge 22%and upon its operation by the hand wheel, the operating screw works onor against extension it of the sledge 23 and when the same is displacedthereby, the adjusting screw wedges the carriage 23 with its rollers2:3, flbagainst guides 32, 33, so that the carriage will slide downwardsand will comthe flexible beam 25 with a pressure equal act-28,504.

to about per one ton to be indicated on scale iii.

In this position the extended rim 2% engaged by the flexible beam 25will press downward against the internal extended rim 4! of the knifebar 5 so that the pressure produced between the guides and 33respectively and the rim will always remain available for furtheroperations.

My novel and improved cutting machine operates as follows:

The hand lever 42 is pulled back with the rollers and then moved to theleft for the purpose of operating friction clutch M for starting themachine, by coupling the same with the motor, which is preferably keptrunning idle during working.

The knife bar 5 will then move downwards and to the left guided byroller guide 34. During the oblique movement of the knife bar 5, theback plate 22 moves with the sledge 23 vertically, guided with theirends in the side frames 2 and 3, while at first the sledgesimultaneously slides horizontally to the left in guides 22 and 23 onthe back plate to meet the oblique movement of the knife bar.

The vertical movement of the back plate together with the horizontalmovement of the sledge produces the exact path for the obliquely movingguide 3% of the knife bar however, these movements are dependent uponthe height of the paper stack, and these movements are stopped by paperstack, the height of which varies in practice.

At the moment of arresting the paper stack (clampin down) the saidmotions of the back plate and of the sledge stop, the rim of the knifebar releases the rim of the sledge, and now, the pressure is transferredupon the paper stack and holds the same, while the knife bar continuesto complete the oblique movement (stroke) by performing the out.

When, the knife bar is going upwards while the clamp is still holdingthe stack, the rim of the knife bar meets the rim of the sledge,releases the sta-ck by transferring the same clamping pressure back intothe clamping housing, while the back plate with the sledge are slidingback into the starting position to stop at the upward point of thestroke. The knife bar the clamping unit are in an oblique position tothe machine frame and will permit starting the cutting at the left sideof paper pile in the machine first, after the paper pile on the tablehas been clamped down by the clamp beam. 1 parallel with the table 4while the balance beam l is in position in accordance with the obliquelydisposed rim 25 As soon as the full clamping pressure is transmitted tothe paper pile, the rim M of the knife bar releases the rim 25 totransfer the pressure to the clamp beam l and beam and allows the unitto follow the cutting movement.

During the cutting operation the knife bar with the knife will graduallyassume a parallel position to the table completing it at the bottompoint of the stroke by means of the equivalizing lever 45 which isconnected to the knife bar and the pull rod.

Hereafter the knife bar will again move upward, and the rim M willengage rim 25 and release the paper pile to rise with the clamping unitto the upper position and stop, ready another operation.

The stop is effected by the cam 46 which engages the roller 43 forturning the shaftfl to release the clutch.

It will be understood that I have described and shown the preferred formof my device only as one example of the many possible ways topractically construct the same, and that I may make such changes in thegeneral arrangement of my paper cutting machine and in the constructionof its minor details as come within the scope of theappended claimswithout departure from the spirit of my invention and the principlesinvolved.

Having thus described my invention what, I claim as new and desire tosecure by Letters Patent is:

1. A cutting machine of the guillotine type for cutting paper, leather,textile fabrics, rubber and the like, comprising. a cutter carried by aknife bar, an automatic paper clamping device operated by a pressureproducing unit, a means to impart to said knife bar a vertical andoblique movement, a back plate and a sledge, the oblique movement of theknife bar imparting to said sledge a combined vertical and horizontalmovement causing it to slide along the back plate and imparting to thelatter a vertical movement, and said pressure unit lying between aportion of said knife bar and a portion of said sledge which overliessaid clamping device, and a scale operated by said pressure unit toindicate the pressure in tons during each operation of the cuttingperiod.

2. A cutting machine as described comprising a frame including its sidebars, a back plate guided'with its ends between the side bars of saidframe in vertical direction, guides on said back plate and a sledgedisplaceable along said guides in horizontal direction, a knife barcarrying guides, a roller carriage, a flexible beam on top of which saidcarriage rests for connecting said guides on the knife bar and thesledge to form a combined unit for causing the progressive engagement ofthe sledge and flexible beam to correspond to the knife barsobliquemovement, and an angular lever attached to the sledge at one endhaving intermediate its ends means to actuate the roller carriage andconnected to said clamping mechanism, and an operating screw attached atthe other end of said lever, and hand operated means to operate saidscrew to produce a clamping pressure.

3. A cutting machine comprising a plurality of mechanical elementscombined to form a unit constituting an automatically operating paperclamping device including a knife bar and a clamping bar, both guided inthe machine frame, and oblique roller guides on said knife bar, a rollercarriage, and a lever arrangement pressing said carriage against saidroller guides and a flexible beam upon which the pressure developed bysaid roller guides is transferred by the intermediary of the rollercarriage for flattening said beam, and means for indicating the pressureas a weight on a scale.

4. A cutting machine comprising a plurality of mechanical elementscombined to form a unit for constituting an automatically operatingpower producing clamping mechanism, including a knife bar having anextended rim, a knife on said bar for cutting the paper, and a flexiblebeam subjected to the clamping pressure of said clamping mechanism, asledge having a rim supported by the rim of said carriage, an angularlever attached to said sledge at one end, and connected to the clampingmechanism, and an operating screw attached at the other end ofsaidlever, a hand wheel to operate said screw to operate said unit toproduce a clamping pressure, means for disengaging both rims during thecutting operation, a clamp beam engaged by said flexible beam fordepressing a stack of material on its table, adapted to be depressed bythe transfer of pressure upon the disengagement of said rims by theoperation of the knife connected to said knife bar for performing thecut.

5. A paper cutting machine comprising a shearing cutter, a means forguiding the same, and a sledge combined with the bar of said outteracted upon by a pressure producing power unit, a clamping device, andmeans for operating the same, means for operating said power unitindependently of the first means for operating said clamping device,means for visibly indicating the amount of pressure exerted by theclamping device, and a balance beam engaged by the bottom of the sledgecentering on said clamping device for balancing the pressure at the endof a stroke of the power unit.

6. A paper cutting machine comprising a motor operated shearing knife, aknife bar and a sledgesupported bysaid knife bar, a means for guidingthe knife bar, a pressure producing unit between the knife bar andsledge, manually operated means for regulating the pressure produced bysaid unit, a balance beam, a clamping device for the paper stack,connected by the sledge and pressure unit and balance beam with theknife bar, a gage controlled by said pressure unit to indicate thepressure exerted in tons, said pressure unit consisting of a flexiblebeam for 3 yieldingly bearing upon the sledge, a treadle operating theclamping mechanism, the balance beam balancing the pressure beam at theend of a stroke of the pressure unit.

'7. In a paper cutting machine of the class described, a clamping unitfor clamping the paper stack during the cutting thereof, a back plate, aknife bar, guides formed with said plate, a sledge sliding in saidguides, a carriage bolted movably to said sledge for obliquedisplacement, rollers carried by said carriage, guides for engaging saidrollers carried by said knife bar, a flexible beam supporting saidcarriage, an extension on said sledge, a hand operated screw forengaging said extension to displace said carriage to compress saidflexible beam in which a compression of a fraction of an inch to one tonis developed, and means to indicate this pressure on a scale, said knifebar having a rim normally supporting a rim of the sledge but releasingthe same for transferring the full pressure of the unit to a clamp beamto allow the unit to follow the cutting movement of the knife.

8. In a paper cutting machine of the class described, a sledge, a scale,an extension thereon, bolted to said sledge, a rackon a carriage, saidsledge to which said rack is connected, a flexible beam on which saidcarriage rests engaging the rim of said sledge, the variation in theflexible beam while compressed influencing said scale, a finger on saidscale, having segmental gear teeth in mesh with said rack and pivotallysecured at its lower end to the scale, a curved member at the upper endof said finger, a hand and a curved member at the lower end of said handin engagement with said curved member of the finger.

9. In a paper cutting machine, a back plate, a clamping mechanism guidedby said plate and comprising a sledge, means for slidably guiding saidsledge, an extended rim at the front thereof, a clamping beam, and abalance beam for the same adapted to be engaged by said rim of saidsledge during the operation of the clamping mechanism, a carriage boltedto the front of said sledge, rollers on said carriage, guides on theknife bar co-operating with said rollers, a flexible beam on which thecarriage rests, and carried by the rim of the sledge, said balance beambeing a means to center the pressure on the clamp beam.

10. A cutting machine as described comprising a sledge, a carriageslidably bolted thereto, and connected by a flexible pressure beam to aclamping device, a control device for said pressure beam, consisting ofa scale plate having its face divided into fields and numbers fortranslating the power developed by said clamping device and forindicating pounds and tons, and fastened by screws to the sledge, a handoperated gearing means for controlling a rod and rack connected with thecarriage, and actuating an indicator over said face.

11. A cutting machine as described consisting of a back plate guidedwith its endsin the side frame for vertical movement, and provided withinternal guiding slots for a sledge with an extended rim for carrying aflexible beam and a roller carriage, an indicator combined with theseelements, a knife bar guided with its ends in the side frame, having anextended rim for supporting the rim of the sledge, provided with anoblique slot as guide and with oblique guide plates to transmit bymeans. of the rollers of said roller carriage movement to the back plateand the sledge combined with the flexible beam, the roller carriage andthe indicator.

12. A cutting machine as described in claim 11, having also as a powerproducing arrangement, a double arm lever bolted to the sledge providedwith a hand wheel screw for forcing the roller carriage against obliqueguide plates for transforming the exerted hand force to a pressure oftons, to store the power and to change same for any pressure requiredfor the operation.

13. A cutting machine as described comprising a clamp arrangement, and aclamping housing and a knife bar, means to impart to said knife bar anoblique position, said clamping housing resting on the rim of the knifebar and in oblique position of the knife bar the housing also assumingan oblique position with a balance beam intermediate the clampinghousing and said clamp bar to transmit the pressure as a weight of anydegree produced by the elements of the clamping housing upon the balancebeam and to center the pressure or weight on the clamp bar and to pressthe stack against the table during the cutting period.

14. A pressure adjusting device for the work clamp of a paper cuttingmachine including a sledge having a fulcrum bearing and a pressurepoint, a Wedging carriage s'lidably mounted upon the sledge and alsohaving a pressure point, and a lever pivoted in the fulcrum bearing withone end carrying means bearing upon the pressure point of the carriageand the other end carrying adjusting means bearing upon the pressurepoint of the sledge.

15. A paper cutting machine of the character described comprising acutter, means to obliquely displace the cutter during its downwardmovement, and a clamping housing enclosing a resilient pressure element,a paper clamping bar acted upon by said pressure element, and meanscarried by the cutter which throughout its oblique displacementconstantly bears upon said pressure element at a point at unvaryingvertical distance above the clamping bar.

16. A cutting machine comprising a work clamp, a plurality of mechanicalelements combined to form a unit for constituting an automaticallyoperating power applying clamping mechanism including a knife bar havingan ex tended rim, a knife on said bar for cutting the paper, and aflexible beam subjected to the clamping pressure of said clampingmechanism, and means controlled by said power applying clampingmechanism to move said clamping mechanism downward in angular directionto said work clamp to make the contact of the clamping mechanism withthe Work clamp cuniform and proportionally jerkless and quiet.

AUGUSTUS MISCH.

